[Mojo Video Capture] Simplify media::VideoCaptureDevice::Client:Buffer to a struct

content/browser/renderer_host/media/video_frame_receiver_on_io_thread.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/media/video_frame_receiver_on_io_thread.h"
 
 #include "content/public/browser/browser_thread.h"
 
 namespace content {
 
 VideoFrameReceiverOnIOThread::VideoFrameReceiverOnIOThread(
     const base::WeakPtr<VideoFrameReceiver>& receiver)
     : receiver_(receiver) {}
 
 VideoFrameReceiverOnIOThread::~VideoFrameReceiverOnIOThread() = default;
 
 void VideoFrameReceiverOnIOThread::OnIncomingCapturedVideoFrame(
-    std::unique_ptr<media::VideoCaptureDevice::Client::Buffer> buffer,
+    media::VideoCaptureDevice::Client::Buffer buffer,
     scoped_refptr<media::VideoFrame> frame) {
   content::BrowserThread::PostTask(
       content::BrowserThread::IO, FROM_HERE,
       base::Bind(&VideoFrameReceiver::OnIncomingCapturedVideoFrame, receiver_,
                  base::Passed(&buffer), frame));
 }
 
 void VideoFrameReceiverOnIOThread::OnError() {
   content::BrowserThread::PostTask(
       content::BrowserThread::IO, FROM_HERE,
       base::Bind(&VideoFrameReceiver::OnError, receiver_));
 }
 
 void VideoFrameReceiverOnIOThread::OnLog(const std::string& message) {
   content::BrowserThread::PostTask(
       content::BrowserThread::IO, FROM_HERE,
       base::Bind(&VideoFrameReceiver::OnLog, receiver_, message));
 }
 
 void VideoFrameReceiverOnIOThread::OnBufferDestroyed(int buffer_id_to_drop) {
   content::BrowserThread::PostTask(
       content::BrowserThread::IO, FROM_HERE,
       base::Bind(&VideoFrameReceiver::OnBufferDestroyed, receiver_,
                  buffer_id_to_drop));
 }
 
 }  // namespace content